Single-phase Filter Family with New Variants

Designed for protection class II applications

  • Single-phase Filter Family with New Variants
    Single-phase Filter Family with New Variants

SCHURTER expands its FMAB NEO single-phase filter family with new variants for protection class II applications. The new filter series without protective ground connection is available as a medical M5 version for a rated current range from 1 A to 20 A with plug-in terminals.

Protection class II, also known as protective insulation, means protection by double or reinforced insulation. All clearances and creepage distances must be doubled, and inside the filter double or reinforced insulation is mandatory. The new FMAB NEO filter series Protection Class II meets all these requirements: reinforced insulation inside the filter and the plug-in terminals have a large plastic collar. The filters are tested with 4 kVAC between L or N against the metal housing.


Protection class II applications do not have a protective ground wire. To ensure effective personal protection even without a protective ground conductor, protection class II devices feature additional insulation. Typical applications include power tools, audio and video equipment and many medical devices. Protection class II is even mandatory for a variety of medical applications. For example, medical devices for use at home must be of protection class II according to IEC 60601-1-11.


The single-stage FMAB NEO filter family has a particularly compact design combined with high performance. It is suitable for applications in the temperature range from -40 °C to 100 °C and has ENEC and cURus approvals.

High Performance Versions

In addition to the standard version, SCHURTER also offers variants with optimized attenuation. These variants have particularly high-quality core materials.

Graduated in political sciences and international relations in Paris, Anis joined the team in early 2019. Editor for IEN Europe and the new digital magazine AI IEN, he is a new tech enthusiast. Also passionate about sports, music, cultures and languages. 

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